Links to Relevant Wiki Articles(s):
To permanently delete your account:
Log into Scratch
Click your username in the top right-hand corner
Select "Account Settings", then click the "I want to delete my account" link at the bottom of the page
You should only do this if you are absolutely sure that you want to delete your account. If you delete your account, you will not be able to restore it or access your deleted projects.
If your account is banned or otherwise inaccessible, please reach out to the Scratch Team via Contact Us with your username and the email address on file for the account.